482 SUMMARY OF CURRENT RESEARCHES RELATING TO 



caverns, there were still fewer on soils composed of gypsum, and on the 

 latter substratum the thallus was less developed, and usually more sinuous. 

 On silica both species and individuals are rare. 



American Lichens. — While publishing a list of lichens from the 

 Peterboro Hills in New England,-R. Heber Howe* insists on the extreme 

 desirability of such local lists being made all over the country, in order 

 that the distribution of lichens may become better known. The list he 

 himself has made includes 38 species which were all collected in one 

 outing. Specimens merely observed were not enumerated ; only those 

 that were collected. 



C. W. Harris f publishes also a local list of lichens collected at 

 Chilson Lake, New York. The number is much larger, and many 

 interesting forms are included. 



A short note by Bruce Fink J announces a Field Book for Beginners 

 called " Common and Conspicuous Lichens of New England," to be 

 published in serial parts by K. H. and M. A. Howe. Readers are 

 warned that microscopic examination is absolutely necessary for the 

 determination of many species. 



R. Heber Howe § also gives further information about the distribu- 

 tion of Ramalina rigida. He finds that it has quite a wide range along 

 the New England coast. 



El en kin, A. A. — Species novae lichenum in Sibiria arctica acl. Birula-Bialynizki 

 oollectse (expeditio baronis Tol.) (New species of Lichens from Arctic Siberia, 

 collected by Birula-Bialynizki.) 



[Species of Parmelia and Placoclium are described.] 



Ann Mycol, iv. (1906) pp. 36-8 



J att a, A. — Lichenes lecti in Chili a cl. G. J. Scott Elliott, quos determinant 



(Lichens collected in Chili by Scott Elliott, and determined by A. Jatta.) 

 [The list includes several new species.] Malpighia, xx. (1906) pp. 3-13 



Myxomycetes. 



Study of Myxomycete.|| — Gr. Nadson and A. Raitschenko found 

 Enteromyxa paludosa in a dish containing water and algae from a pond. 

 It lives on the unicellular Synechococcus wruginosus, one of the Cyano- 

 phycese. Sporocysts are formed containing usually 3-6 spores ; germi- 

 nation was not observed. The authors consider the organism to be a 

 Myxomycete belonging to the group Endosporese. 



Schizophyta. 

 Schizomycetes. 



Bacillus violarius acetonicus : an Acetone-producing Microbe.lf 

 L. Breaudat describes a chromogenic microbe isolated from the drinking 

 water of Saigon (Cochin China), which produces acetone from proteid 

 matter. It is a short bacillus with rapid oscillatory movement, staining 



* Bryologist, ix. (1906) pp. 46-8. t Tom. cit., pp. 48-52. 



J Tom. cit., p. 52. § Tom. cit., p. 54. 



|| Scripta Bot. Hort. Univ. Petrop., fasc. xxiii. (St. Petersburg, 1905) 18 pp., 

 4 pis. See also Ann. Mycol., iv. (1906) p. 100. 

 f Comptes Rendus, cxlii. (1906) p. 1280. 



